What is Current Transformer?

Basically a current transformer is a device that is surrounded by live phase wire in a three-phase system to measure the current flowing through it. As the name suggests, this is a type of transformer. A current transformer comes under the working analogy of a step-down transformer. A current transformer (CT) converts high voltage current flowing through its primary winding (phase wire) into low voltage current flowing through its secondary winding (internal ammeter). The meter will then automatically scale or calibrate internally to reflect the original value.